CN86100995A

CN86100995A - Emery wheel

Info

Publication number: CN86100995A
Application number: CN86100995.9A
Authority: CN
Inventors: 斯科特·L·巴尼特; 加里·M·法里斯
Original assignee: Minnesota Mining and Manufacturing Co
Current assignee: 3M Co
Priority date: 1985-02-11
Filing date: 1986-02-06
Publication date: 1986-09-03
Also published as: JPH0671705B2; BR8600567A; KR940001133B1; AU572016B2; CA1282964C; DE3675556D1; EP0193296B1; JPS61192479A; US4609380A; CN1005323B; KR860006316A; AU5289986A; ZA86677B; SG65691G; MX168103B; EP0193296A1; HK73591A

Abstract

Bonding and be dispersed in the emery wheel that the abrasive grain in the base is formed with a kind of caking agent series, this caking agent series connects agent and consumption by pliable and tough viscosity to be enough to reduce the compatible polymer of defiling that reduces of defiling and to form.With the emery wheel of the bonding agent cementation abrasive grain that does not contain compatible polymer,, when contacting rotation, tend to the surface of the work of defiling with workpiece when its under the heating condition (for example emery wheel is very high and superficial velocity is very fast to the pressure of workpiece).

Description

Emery wheel

The present invention with evenly disperse and to be bonded at the emery wheel that the abrasive grain in the base is prepared from organic adhesive relevant.

As everyone knows, revolving wheel is by abrasive grain being disperseed equably and cement in by on solid or a kind of organic polymer base that forms of foaming organic polymer or be prepared from the nonwoven fibrous web (nonwoven fiber web), and is widely used.These emery wheels are used for the burr removing and the surperficial refine of picture foundry goods, drilling part or this class workpiece of punching part.In order to process the part that shape or surface smoothness all meet the requirements, just must remove these burrs and the overlap of surface of the work.The minor diameter emery wheel that turns round under high speed and high pressure is particularly useful.In order to satisfy different performance requirements, when very big working pressure is born on the surface that emery wheel or emery disc contact with workpiece or part, it must have sufficiently high intensity, durable in use, not damaged, do not defile.

Upton is in US Patent No 2,885, in 276, discloses some and comprised the abrasive product of solid or foaming organic polymer base.People such as Hoover and Fitzer (the two is the application's agent) respectively disclose in 593 and 4,227,350 with the example of a kind of senior low-density adhesive-bonded fabric as the abrasive product of base in U.S. Patent No. 2,958.

In general, abrasive grain being cemented in the fluoropolymer resin bonding agent in the base of above-mentioned abrasive product, both can be the hard heat curing-type, also can be strong and tough elastomeric-type.The hard thermosetting resin, for example base catalysis phenolic resins is widely used for abrasive grain is cemented on sheet base or the non-woven fibre base.Though common this hard resin bonding agent has very high tensile strength, low disconnected strong percentage elongation and is difficult for producing bigger variation under the condition of high temperature, it is easy to produce brittle fracture and but makes us dissatisfied.Use under the application conditions of both flexibles and more wear-resisting abrasive product the more symbol requirement of high strength tough elastomer resinoid bonding agent in some requirement.Fitaer is in US Patent No, discloses the example of this bonding agent in 4,227,350.The tensile strength of this elastomer class bonding agent is fabulous, and elongation at break is very big, and anti-brittle fracture.But be lamentedly, when this abrasive product at contact workpiece at a high speed and under the high pressure and bear when loading, under the hot conditions that may run into, but show obvious ruckbildung.This softening behavior often causes this abrasive product to defile or partly transfer on the surface of the work, and this point just people do not wish to take place.

The invention provides some abrasive products, wherein optimal a kind of be emery wheel, when under high pressure and High-speed machining condition, when it contacts with workpiece, seldom or do not have the undesirable wheel face of people defiling or transfer phenomena to surface of the work.

The invention provides a kind of emery wheel, this emery wheel is made by even dispersion and by the abrasive material that a kind of bonding system of novelty cements in organic base, and the caking agent series of this novelty is a kind of bonding agent and the compatible mixture of polymers that can reduce the consumption of defiling.The glass transition temperature of this mixture preferably is at least 40 ℃, and the best is 50 ℃.The compatible polymer that this minimizing is defiled can obtain by adding a kind of solid-state or liquid active material, and other component reaction in this active material and the above-mentioned bonding system generates copolymer, homopolymers or other product.This compatible polymer preferably adds with the state after the polymerisation separately, and its preferred glass transition temperature is at least 50 ℃.

The original state of above-mentioned bonding agent is liquid, can be solidified into a kind of bonding polymer material of toughness then.This bonding agent will cement in abrasive grain in the emery wheel base securely, but when this emery wheel rotates under the state that contact workpiece has heat to generate, for example when emery wheel when very high and its superficial velocity is very fast to the workpiece applied pressure, tend to make surface portion to defile on the surface of the work.After adding above-mentioned compatible polymer, the phenomenon of defiling can reduce significantly, perhaps eliminates fully.

Also have a certain amount of conventional lubricants (using most typical a kind of in the emery wheel) in the preferred emery wheel caking agent series, defile so that further reduce.

Employed when mentioning bonding agent " liquid state " speech refers to a kind of for the soft condition that applies.The method that this state can be by fusion, the method, these two kinds of methods that is mixed with a kind of solution with solvent mutually and in order to and other similar method obtain." mixture " this term refers to, the mixture or the product in fact uniformly of bonding agent and compatible polymer." curable " this term refers to, for example by the cooling melted material, make that solvent in solution/polymer solution steams, crosslinked and similar method, harden to pliable and tough in fact and state that be not clamminess." compatible " speech refers to, and bonding agent and polymer in fact evenly mix and the ability that significantly is not separated.(the II volume, defined in p260), in compatible bonding agent and mixture of polymers, the square root of the interior poly-density difference of bonding agent and polymer will be less than 1 at physical chemistry of high polymer as H.Mark and A.V.Tobolsky.

Abrasive product of the present invention can be made into any Common Shape.The content according to the present invention, preferred article shape is a wheel shape.The emery wheel of dish type and right cylinder is very typical, and its size can be very little, and for example the height of cylinder is the cms magnitude; Perhaps very big, for example the height of cylinder is 2 meters or bigger; And the diameter of cylinder can be very little, for example several centimetres; Perhaps very big, for example 1 meter or bigger.For suitable axle or other mechanical positioner are installed, emery wheel has central through hole so that emery wheel in use can be rotated.The size of emery wheel, profile, base and rotary means, these all are on record in the prior art.

The base of abrasive product can be solid-state or the foaming organic polymer, also can be nonwoven fibrous web.People such as Hoover are in U.S. Patent No. 2,958, have mentioned the example of a senior non-woven fibre base in 593, this base be by be bonded in the bonding agent contact point that contains abrasive grain on the crimped rayon staple constitute.Fitzer is in U.S. Patent No. 4,227, discloses a kind of base in 350, and it is to be made by the automatic bonding continuous fiber of filling out in the three-dimensional wave mode.

Abrasive product of the present invention can adopt in the prior art well-known proper technology to manufacture.For example, the shape of emery wheel can form from cross cutting on the abrasive plate.In addition, still uncured or only during local solidification when caking agent series, can twine fragment, fillet or the spherical abrasive material of long grain spirally in the emery wheel type body, solidify then and make emery wheel.Further, fabric uncured or local solidification can be cut into band shape or plate-like, and they are stacked the back lamination, makes the high density abrasive product under lamination.These forming techniques also are on record in prior art.

Preferred abrasives goods according to the present invention comprise: the caking agent series that is in hard thermosetting resin inside or lower floor, or skin is the high strength flexible elastomer resin of surface-coated coating (being referred to as " sizing material " coating sometimes), and this coating is a bonding agent mentioned above and can reduce the compatible mixture of polymers of defiling.The goods that contain fabric or long fibre fabric generally include the first road adhesive coating that generates the elastomer resin internal layer and can generate the outer field second road coating of elastomer resin, promptly so-called " size coat ".Generally speaking, the outer field weight of bonding agent is at least 1/2 of bonding agent gross weight.Whole caking agent series can mainly be made up of said mixture.Then a kind of situation, then base normally is made of the solid block of a kind of foamable polymer and polymer.

The elastomer resin bonding agent of this soft viscosity preferably has high molecular weight, solvent soluble or thermosetting, and under unmodified, curing or drying regime, its ultimate tensile strength preferably is at least 20 * 20 ⁶Pa, elongation at break preferably are at least 100%.

If added compatible polymer and/or lubricant in use, these physical parameters of above-mentioned bonding agent have reduction slightly; But even like this, this bonding agent also is enough to the abrasive grain cementation meet the demands to the effect on the base.

A preferred embodiment of the pliable and tough adhesive bond agent of high molecular weight solvent solubility is a thermoplastic polyester type polyurethane, and its commodity are called " Estane " 5703, are sold by B.F.Goodrich company.The example of the elastomer thermosetting resin bonding agent of pliable and tough, viscosity is polyethers or the polyesters with isocyanate end, and it can react with multifunctional reactive hydrogen curing agent.Preferred heat cured system is with the aliphatic series of aromatic diamine class curing or the polytetramethylene glycol polymer class of aromatic isocyanate end group.The commodity of the preferred embodiment of vulcabond polymer are called " Adiprene " L-100, and L-167 and L-315 are sold by Uniroyal Co., Ltd.The most preferably, the polymer of these isocyanate end is with end-capping reagent (for example 2-diacetylmonoxime) end-blocking.Preferred aromatic diamine is two (4-aminobenzene) methane (to call MDA in the following text) and two (2-chloro-4-amino) methane.

Preferably can reduce the compatible polymer of defiling is a kind of high molecular weight polymers material that can mix with bonding agent, and this was above narrating.The glass transition temperature of preferred compatible polymer is approximately higher than 50 ℃.This compatible polymer can react with the bonding agent of caking agent series, also can only carry out physical mixed with bonding agent.Generally speaking, the molecular weight of this compatible polymer is approximately greater than 2000.The example of very useful compatible polymer comprises the phenoxy resin of the commodity fluorine-based PKHH resin of " UCAR " benzene by name that connection carbon geochemistry Co., Ltd sells, the bisphenol A type epoxy resin of the commodity that shell (Shall) chemical company sells " Epon " 1007F by name, the trade name that connection carbon geochemistry Co., Ltd sells be the copolymer of the vinyl chloride/vinylacetate of the intermediate molecular weight of " UCAR " VAGH-1 and partial hydrolysis, and the commodity that Meng Sangtuo (Mon-santo) polymer and petrochemistry company sell are called the styrene of " RJ-100 " and the copolymer of allyl alcohol.

As previously mentioned, above-mentioned compatible polymer can prepare by adding a kind of active material, for example adds a kind of liquid that can carry out polymerisation or other reaction in caking agent series.The example of this active material is bisphenol A-type diglycidyl ether (a kind of liquid polymerizable oligomer, commodity are called " Epon " 828, are sold by shell (shell) chemical industrial company).Some other in bonding system, can carry out polymerisation and produce reduce the characteristic of defiling liquid or solid-state active material also of great use.

The mixture of polymer and pliable and tough adhesive bond agent, its glass transition temperature should be at least about 40 ℃, preferably at least about 50 ℃, the abrasive product made from this mixture has and reduces the tendency of defiling, and the quantity of the compatible polymer that is added in this and this mixture has direct relation.Preferred mixture comprises that 10%(is by weight at least) compatible polymer, and comprise 20～50%(in the mixture by weight) compatible polymer for better.

This caking agent series and mixture can contain lubricant commonly used in the present abrasive product, defile so that further reduce.When how many this lubricants of discovery can play reducing defiles does the time spent, the anti-performance of defiling that contains the emery wheel of caking agent series (containing compatible polymer and conventional lubricants in this system simultaneously) will obtain beyond thought improvement, thereby has surpassed the emery wheel that only contains the caking agent series of lubricant.The example of lubricant commonly used comprises metallic stearate, for example: lithium stearate, indium sulfide and similar salt thereof.

The employed abrasive grain of production abrasive product of the present invention can be an any known abrasive material commonly used in the abrasive material explained hereafter.The size of abrasive material and type can with produce emery wheel in specification commonly used the same.After the professional has understood content of the present invention disclosed herein, will select suitable abrasive material at an easy rate.

Below exemplify some limiting examples, so that the present invention is further described.Except that other have indicate, umber as referred to herein is all by weight.

The embodiment I

On the fabric make-up machine of commercially available commodity " Rando Webber " by name, with 18

It is thick that nylon 6-6 fiber is made 15mm, and weight is the low-density adhesive-bonded fabric of 80g/m.The low-density adhesive-bonded fabric of making like this carries out roller coating with a kind of pre-adhering resin, the dry weightening finish that provides is 45g/m, consisting of of employed roller coating solution: the poly-two isocyanic acid butanediols [1 of 39.3% mixed xylenes, 16.1% the solution of forming by 35 parts of methylene diphenylamines (MDA) and 65 parts of acetate cellosolvo esters, 44.6% ketone end-blocking, 4] (Uniroyal company sells ester, commodity are called " Adiprene BL-16 ", and molecular weight is about 1500) and micro-polysiloxane defoamers.To pass through convective oven through the fabric of roller coating, Control for Kiln Temperature is at 150 ℃, and the time of staying is about 7 minutes, makes pre-adhering resin be cured to the state that is not clamminess.The thick about 10mm of the pre-bonding adhesive-bonded fabric of making like this, the about 126g/m of weight.

Consisting of of bonding agent: diethylene glycol (DEG)-ethylether of 39.8%, 59% the base catalysis phenolic resins that contains 70% nonvolatile matter, 1.2% sodium hydrate aqueous solution (NaOH: H ₂1) and 0.06% fluorine-containing surfactant (sold by Minnesota Mining and Manufacturing Company, commodity are called " FC170 ") O=1:.With this bonding agent with the dry consumption roller coating of 54g/m on above-mentioned pre-bonding textiles.Then, with 815g/m ²Consumption, be that 100 silicon carbide abrasive particle (particle mean size is 140 microns) sprays behind the roller coating bonding agent on the still undried adhesion fabric equably with granularity in the jet-stream wind.During spraying, jet-stream wind directly faces toward the main surface of fabric.

Then, the sizing material resin roller coating of " A "-" H " that table is indicated in the I to the fabric that has sprayed abrasive material, thereby make the sizing material resin fabric.The sizing material resin has on the fabric of abrasive material to cementation with 32%, 24% or 16% dry weightening finish consumption roller coating.The abrasive material fabric that makes each sheet apply the sizing material resin passes through convective oven, and Control for Kiln Temperature is at 70 ℃, and the time of staying is about 4 minutes, makes its part drying remove almost about 8.5% volatile matter (by the final weight of coated fabric).

The table I

Sizing material resin, %(are by weight)

Component A B C D

The Adiprene L315 ' 52.7 40.9 36.4 31.8 of end-blocking

4,4 '-methylene-dianil (MDA) 8.0 6.2 5.5 4.8

Lithium stearate 5.2 4.5 4.5 4.5

Mixed xylenes 14.1 20.8 11.1 1.4

Methyl ethyl ketone----

Acetate cellosolvo ester 20.0 23.5 34.4 45.2

" UCAR " phenoxy resin PKHH ²-4.1 8.1 12.3

“Epon”100TF ³- - - -

“UCAR”VAGH-1 ⁴- - - -

“RJ”-100SAA ⁵- - - -

The additive percentage ⁶0 10 20 30

E F G H

34.5 36.2 35.1 40.4

5.3 5.5 4.5 6.1

4.5 4.5 4.4 -

7.4 11.1 7.0 6.3

- 24.3 - -

38.6 10.3 38.8 38.2

- - - 9.0

9.7 - - -

- 8.1 - -

- - 10.2 -

20 20 20 20

1. contain " Adipene " L315 that 74.1% Uniroyal company sells, add 14.8% 2-diacetylmonoxime and 11.1% acetate cellosolvo ester and carry out termination process.2. the molecular weight of connection C.-Chem AG sale is 30,000 phenoxy resin.3. the epoxy resin of selling by shell chemical company.4. vinyl chloride, the vinyl acetate resin of the intermediate molecular weight partial hydrolysis of selling by connection C.-Chem AG.5. a kind of styrene and the allyl alcohol high polymer of selling by Meng Sangtuo polymer and petrochemistry company.6. the weight percent of additive " UCAR " phenoxy group PKHH, " Epon " 100TF, " UCAR " VAGH or " RJ "-100 is by the solid weight meter of " Adiprene " L315 and MDA.

With four areas is 305mm ², be coated with sizing material resin of the same race, and partly the fabric of drying is stacked together, and is placed on then on the platen-press that is heated to 135 ℃, be laminated to 6mm, and an abrasive sheet is just made in pressurize in 15 minutes.After the partly solidified abrasive sheet of each sheet takes out from press, be put in the cross-ventilation heating furnace, further solidify down at 135 ℃ and handled 90 minutes.After the abrasive sheet cool to room temperature that solidifies, touch from the thick abrasive sheet of 6mm that to cut out diameter be that 75mm, center-hole diameter are the disk of 9mm.

Once to emery wheel (table indicate in the III sample number into spectrum be 2～17) material for test piece defile or metastasis degree was carried out evaluation.Emery wheel is installed on the central shaft of air force lathe, and its rotating speed is that per minute 18,000 changes.The lathe supporting ﹠ stablizing drives emery wheel contact test surface of the work and loads.The emery wheel of rotation is 35.6N to the titanium mesh test specimen applied force of 60mm * 300mm, and test specimen is installed on the mobile platform, can make emery wheel with the speed of 25mm/sec. along the metallic plate test specimen long distance of 200mm of advancing.Once the amount of transferring to the material on the surface of the work from the test emery wheel is carried out observation, and determined the grade of defiling according to represented degree in the table II.

The table II

The grade observed result

1 does not have transfer

2 extremely slightly shift

5 obviously work the mischief

8 shift in a large number

10 super amount transfers

The result of the above-mentioned test of defiling, the glass transition temperature (Tg) of the sizing material resin material that contains in the relative amount of sizing material resin (%), the abrasive product is according to the method described in the ASTMD4065-82, measure by dynamic analysis method, under the Tg temperature that is write down, when the sizing material resin was transformed into elastomeric state, maximum (Tan δ) can appear with the ratio of energy storage in loss.The relative amount (%), kind and the sizing material resin (A-H) that add polymer are listed in the table III.

The table III

Kind relative amount (%) Tg of sample number sizing material resin additive, ℃

2 A do not have 0-25

3 A do not have 0-25

4 A do not have 0-25

5 B phenoxy group PKHH 10 100

6 B phenoxy group PKHH 10 100

7 B phenoxy group PKHH 10 100

8 C phenoxy group PKHH 20 96

9 C phenoxy group PKHH 20 96

10 C phenoxy group PKHH 20 96

11 D phenoxy group PKHH 30 85

12 D phenoxy group PKHH 20 96

13 D phenoxy group PKHH 20 96

14 E “Epon”1007F 20 95

15 F “UCAR”

VAGH 20 82

16 G “RJ”-100 20 86

17 H phenoxy group PKHH 20 100

The sizing material resin adds

Amount (%) shifts test

32 10

24 8

16 7

32 6

24 5

16 4

32 3

24 2

16 1

32 1

24 1

16 1

24 2

24 4

24 5

Some sizing material resin tensile strength and elongation at break measurement have been carried out.Provided measured value in the table IV.Sizing material Resin A, C, E, F, G, H prepare according to the component that provides in the table I, but just do not contain the lithium stearate except that H is original, have also all cast out lithium stearate for all the other five kinds.Various test sizing resins are coated in the thick cured film of formation 0.3mm on the glass plate, and glass plate has applied releasing agent in advance.The glass plate that scribbles releasing agent is to be coated on the glass plate with polyvinyl alcohol water solution, and behind air drying, be prepared from.These sizing material resins solidified 120 minutes down at 135 ℃, will soak the short time then with the glass plate of sizing material in water, so that take off cured film.Measure its tensile strength and elongation at break according to the method for ASTMD412-80.The table IV shows test result.

The table IV

Sizing material resin tensile strength 10 ⁶Pa percentage elongation (%)

A 62.0 210

C 40.0 160

E 46.2 160

F 35.2 170

G 38.6 140

H 11.7 10

In the I in the listed sizing material resin, the glass transition temperature of employed additive provides in as the following table V at table.Glass transition temperature is according to the determine with dsc method of ASTM D3418-75.

The table V

Additive Tg(℃)

Phenoxy group PKHH 100

“Epon”1007F 74

“UCAR”VAGH 65

“RJ”-100SAA 67

Embodiment 18～27

Glass transition temperature (Tg), tensile strength and the elongation at break of the different polyalkylene glycols ether film of the polymeric additive content that solidifies, stop with isocyanates with the methylene diphenylamines have been measured.These films are that 2.89 parts of " Adiprene " BL16 and 1 part of acetate cellosolvo ester solution that contains 35% methylene diphenylamines are mixed.-NCO :-NH ₂The calculating ratio be 1.08: 1.If use polymeric additive, its percentage are to calculate according to the non-volatile content in " Adiprene " BL16 and the methylene diphenylamines.The mixture curtain coating for preparing of q.s is being scribbled on the glass plate of releasing agent, making the thick cured film of 0.3mm.This mixture solidified 120 minutes down at 135 ℃.From on glass this cure polymer film is peeled off, measured its glass transition temperature according to the method for ASTM D4065-82 then.The table VI has gathered result of the test.

The table VI

Tg(℃ of sample number polymeric additive) tensile strength elongation at break %

Trade name consumption (%) 10Pa

18 do not have--35 44.1 460

19 phenoxy group PKHH14 50 48.3 350

20 phenoxy group PKHH20 86 45.5 440

21 phenoxy group PKHH20 ¹85 13.8 130

22 phenoxy group PKHH50 98 40.1 150

23 “Epon”1007F24 42 50.1 380

24 “Epon”1007F23.8 ¹42 9.6 70

25 “RJ”100SAA20 34 16.5 470

26 “RJ”100SAA25 ²46 42.1 430

27 “UCAR”VAGH17 52 45.5 390

1. add 10 parts of lithium stearates (by weight) in per 100 parts of polymer solids.

2.-NCO/-NH ratio calculated change 1.28/1.00 into.

Embodiment 28～30

Measured the glass transition temperature of the thermoplastic polyester type polyurethane that contains or do not contain compatible polymeric additive according to ASTMD4065-82.The commercially available thermoplastic polyester type urethanes (B.F.Goodrich company sale) of trade name for " Estane " 5703 is dissolved in the acetate cellosolvo ester, obtains a kind of 25% solution.To contain " Epon " 1007F or phenoxy group PKHH respectively and be 25% acetate cellosolvo ester solution and be added in " Estane " 5703/ acetate cellosolvo ester solution, obtain the mixture that a kind of " Estane " 5703 and polymeric additive parts by weight equate.As previously mentioned, again the mixture curtain coating of these capacities to the glass plate that scribbles releasing agent, 135 ℃ dry 120 minutes down, test after the demoulding.The table VII has gathered result of the test.

The table VII

Tg(℃ of sample number polymeric additive)

28 do not have-6

29 “Epon”1007F 48

30 phenoxy group PKHH 43

Embodiment 31 and contrast A

Use one have two rubber rollers hit roller (this two pressure roller carries out interior heating with 130 ℃ of Steam Heating elements), according to the content described in the following table VIII, to solid-state thermoplastic polyurethane (commercial goods is called " Estane " 5703), molecular weight is 30,000 phenoxy resin (commercial goods is called PKHH), lithium stearate lubricant and grain composition are 46～67 microns for the 180/240(average particle size range) the silicon carbide abrasive particle roll, look very even up to making, thickness is the abrasive plate of 3.22mm.Survey the glass transition temperature of this abrasive plate according to the method for ASTM4065-82.

The table VIII

Component sample 31 control sample A

“Estane” 200 200

Phenoxy group PKHH 50-

Lithium stearate 25 20

180/240 grating carborundum 1,315 1070

33 ℃-12 ℃ of glass transition temperatures

Two diameter 75mm of each cross cutting emery wheel from the abrasive plate of each piece sample 31 and control sample A.On 150 ℃ hot press, will be superimposed together from two emery wheels that same abrasive plate die cut come and carry out heated lamination, make the emery wheel of thickness 6.3mm.Mensuration by degree that emery wheel is defiled shows: the emery wheel of cross cutting from sample 31 abrasive plates that contain phenoxy resin, the degree of defiling is very low, and from the control sample A abrasive material the emery wheel of cross cutting defile very serious.

Embodiment 32-39, contrast B and C

" Adiprene " L-315 of end-blocking and " Adiprene " BL-16 solidify with MDA respectively, wherein-and NCO :-NH ₂The calculating ratio be 1.08: 1.Before the curing, " Epon " 828 of various content and bisphenol A-type diglycidyl ether (can buy from Shall chemical company) are added to these two kinds of " Adiprene "-MDA mixtures.After mixing under the room temperature, these mixture curtain coatings to the glass plate that scribbles releasing agent, were solidified 2 hours down at 135 ℃ then.Table has gathered the parts by weight according to " Epon " 828 that mixed weight added of " Adiprene " and MDA in the IX, and the glass transition temperature of the mixture of surveying according to the method for ASTMD4065-82 of cure polymer.

The table IX

Sample number " Adiprene " polymer umber " Epon " 828 umber Tg ℃

Control sample B L-315 6 does not have-20

32 〃 6 1 83

33 〃 4 1 76，90＊

34 〃 3 1 58，81＊

35 〃 2 1 56，79＊

Contrast C BL-16 6 does not have-25

36 〃 6 1 62

37 〃 6 1 57

38 〃 4 1 56

39 〃 2 1 52

* range estimation shows, has two-phase to exist in the sample 33,34 and 35.The Tg of its each phase all is recorded in the table.

Claims

1, a kind of emery wheel comprises:

(a) organic material base;

(b) evenly disperse and cement in abrasive grain in the above-mentioned base;

(c) above-mentioned abrasive grain is cemented in caking agent series in the above-mentioned base, it is characterized in that a kind of mixture of this caking agent series for forming by following component:

(1) a kind of initial conditions is the bonding agent of liquid, the pliable and tough adhesive polymer material of curable then one-tenth, this polymeric material can cement in above-mentioned abrasive grain in the above-mentioned base of above-mentioned emery wheel under unmodified state securely, but, when above-mentioned emery wheel contact workpiece when rotation under the heating condition, for example emery wheel is very high to the pressure of workpiece, when superficial velocity is very big, and the surface of the workpiece of will defiling;

(2) consumption is enough to reduce the compatible polymer of defiling that reduces of defiling.

2, according to the emery wheel described in the claim 1, its another feature is that the glass transition temperature of said mixture is at least about 40 ℃.

3, according to the emery wheel described in the claim 1, its another glass transition temperature of above-mentioned compatible mixture that is characterised in that is at least about 50 ℃.

4, according to the emery wheel described in the claim 1, its another molecular weight of above-mentioned compatible mixture that is characterised in that is at least about 2000.

5, according to the emery wheel described in the claim 1, it is another to be characterised in that above-mentioned compatible mixture is Corvic, the styrene-allyl alcohol copolymer that stops from phenoxy resin, epoxy resin, hydroxyl, and choose in their mixture.

6, according to the emery wheel described in the claim 1, its another tensile strength of above-mentioned pliable and tough adhesive polymer material that is characterised in that is at least about 20 * 10pa, and the elongation at break rotating speed is about 100%.

7, according to the emery wheel described in the claim 1, it is another to be characterised in that above-mentioned caking agent series contains the conventional lubricants that consumption is enough to lubricate.

8, according to the emery wheel described in the claim 1, it is another to be characterised in that above-mentioned base is a kind of fiber base of senior, loose, nonwoven.

9, according to the emery wheel described in the claim 1, it is another to be characterised in that above-mentionedly is enough to reduce the consumption of defiling and is at least 10% in the gross weight of curing adhesive system.

10, according to the emery wheel described in the claim 9, it is another to be characterised in that above-mentionedly is enough to reduce the consumption of defiling and is about 20～50%(in gross weight).

11, according to the emery wheel described in the claim 1, it is another to be characterised in that above-mentioned caking agent series mainly is made up of said mixture.

12, according to the emery wheel described in the claim 1, it is another to be characterised in that above-mentioned compatible mixture is prepared from by a kind of active material is added in the above-mentioned caking agent series.

13, according to the emery wheel described in the claim 12, it is another to be characterised in that above-mentioned active character is the bisphenol A-type diglycidyl ether.